ETHERTON, A. (1976). Contact 4: A secondary english course. -- Ed. revisi. Longman.
Chicago Style (17th ed.) CitationETHERTON, A.R.B. Contact 4: A Secondary English Course. -- Ed. Revisi. Kuala Lumpur: Longman, 1976.
MLA引文ETHERTON, A.R.B. Contact 4: A Secondary English Course. -- Ed. Revisi. Longman, 1976.
警告:這些引文格式不一定是100%准確.